Business Entities: File FUTA tax through June if owe more than $500Business Entities: File form 941 for the second quarterBusiness Entities: File second quarter OH IT 501 and SD 101

8/10/2018

Business Entities: Quarterly Filers: Second quarter Ohio CAT payment due

9/17/2018

Corporations: File 2017 form 1120 and 1120S if extendedCorporations: File third quarter estimated tax for C-CorporationsPartnerships: File 2017 form 1065 or 1065-B if extendedIndividuals: File third quarter estimated taxIndividuals: City third quarter estimated payment due